Date: Sat, 12 Nov 2005 16:31:53 +0100
From: Jean Delvare <khali@linux-fr.org>
To: Nick Warne <nick@linicks.net>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] ext3: Fix warning without quota support (was: Linux
 2.6.14)
Message-Id: <20051112163153.6b54ee83.khali@linux-fr.org>
In-Reply-To: <200511121412.35029.nick@linicks.net>
References: <200511121412.35029.nick@linicks.net>
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Hi Nick,

> > Fix the following warning when ext3 fs is compiled without quota
> > support:
> >
> > fs/ext3/super.c: In function `ext3_show_options':
> > fs/ext3/super.c:516: warning: unused variable `sbi'
> 
> I have added this small fix to my 2.6.14.2 build.  A quick question.

Let is be noted that this warning was fixed in a completely different
way in Linus' tree already. My patch is not meant for -stable either,
as it doesn't fix any real problem.

> What does GCC do here - does it just drop and ignore the unused variable?

Without optimizations, gcc 3.3.6 keeps the variable although it won't
ever be used. With -O1 and above (including -Os) it drops the unused
variable.

-- 
Jean Delvare
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